Extractors
* [crunchyroll:playlist] Restrict URL regular expression (17069, 17076)
+ [pornhub] Add support for subtitles (16924, 17088)
* [ceskatelevize] Use https for API call (16997, 16999)
* [dailymotion:playlist] Fix extraction (16894)
* [ted] Improve extraction
* [ted] Fix extraction for videos without nativeDownloads (16756, 17085)
* [telecinco] Fix extraction (17080)
* [mitele] Reduce number of requests
* [rai] Return non HTTP relinker URL intact (17055)
* [vk] Fix extraction for inline only videos (16923)
* [streamcloud] Fix extraction (17054)
* [facebook] Fix tahoe player extraction with authentication (16655)
+ [puhutv] Add support for puhutv.com (12712, 16010, 16269)